Answer: It is possible that area was planned as a retention area for holding runoff until it can soak into the ground. There are many attractive shrubs you could try in that area such as: Aronia arbutifolia "Brilliantissima", shrub or twig dogwoods such as Cornus sericea, Itea virginica, Clethra alnifolia, Ilex glabra (evergreen), Ilex verticillata. Trees such as red or swamp maple (Acer rubrum), river birch (Betula nigra) and willow (Salix) all appreciate extra moisture. However, these are large trees with extensive root systems so do not use them unless you have ample space. Perennials to consider might be Lobelia cardinalis, Iris ensata, Caltha palustris, Monarda, Asclepias incarnata and Eupatorium purpurea. I hope this gives you some ideas.
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